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| author | Peter Eisentraut | 2021-03-31 15:09:24 +0000 |
|---|---|---|
| committer | Peter Eisentraut | 2021-03-31 15:10:50 +0000 |
| commit | 055fee7eb4dcc78e58672aef146334275e1cc40d (patch) | |
| tree | 2034e69c471453e9aea59712b09d3fed95bce330 /src/backend/nodes/copyfuncs.c | |
| parent | 27e1f14563cf982f1f4d71e21ef247866662a052 (diff) | |
Allow an alias to be attached to a JOIN ... USING
This allows something like
SELECT ... FROM t1 JOIN t2 USING (a, b, c) AS x
where x has the columns a, b, c and unlike a regular alias it does not
hide the range variables of the tables being joined t1 and t2.
Per SQL:2016 feature F404 "Range variable for common column names".
Reviewed-by: Vik Fearing <[email protected]>
Reviewed-by: Tom Lane <[email protected]>
Discussion: https://www.postgresql.org/message-id/flat/[email protected]
Diffstat (limited to 'src/backend/nodes/copyfuncs.c')
| -rw-r--r-- | src/backend/nodes/copyfuncs.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/backend/nodes/copyfuncs.c b/src/backend/nodes/copyfuncs.c index d58b79d525c..3a39fa41591 100644 --- a/src/backend/nodes/copyfuncs.c +++ b/src/backend/nodes/copyfuncs.c @@ -2231,6 +2231,7 @@ _copyJoinExpr(const JoinExpr *from) COPY_NODE_FIELD(larg); COPY_NODE_FIELD(rarg); COPY_NODE_FIELD(usingClause); + COPY_NODE_FIELD(join_using_alias); COPY_NODE_FIELD(quals); COPY_NODE_FIELD(alias); COPY_SCALAR_FIELD(rtindex); @@ -2442,6 +2443,7 @@ _copyRangeTblEntry(const RangeTblEntry *from) COPY_NODE_FIELD(joinaliasvars); COPY_NODE_FIELD(joinleftcols); COPY_NODE_FIELD(joinrightcols); + COPY_NODE_FIELD(join_using_alias); COPY_NODE_FIELD(functions); COPY_SCALAR_FIELD(funcordinality); COPY_NODE_FIELD(tablefunc); |